Montigo L52FSDLI See-Through Linear Direct Vent Fireplace, 52"

The Montigo L52FSDLI opens with a hard-to-argue-with number: a 47-inch glass opening width, framed within a 59" rough framing footprint that gives installers genuine design flexibility. This is a see-through, two-sided direct vent linear fireplace — meaning flames are visible from both sides, making it as useful as a room divider as it is as a focal wall feature.

Liquid propane fuels a linear burner rated at 40,000 BTU/hr, giving the fire a long, low, contemporary profile that suits the format. SIT electronic ignition handles starting duties reliably, while the Proflame 2 BASIC (IPI) control system keeps operation straightforward. Manual Hi-Lo flame control lets you dial the fire up or down without fuss — no remote is included with the IPI Base Builders System, so factor that in if remote operation is on your wishlist.

Six bags of ice fireglass media are included with IPI-configured units, resting across the linear burner to create the clean, glowing ember bed that makes this style of fireplace work visually. The framing dimensions — 59" wide, 39" tall, 23¾" deep — are worth handing directly to your builder or installer early, as is the 21¾" glass opening height and the 17.5" minimum clearance above the shelf when using the top vent configuration.

Venting runs through a 5"/8" direct vent system, with both top and rear vent configurations supported. One thing worth noting: side venting is not available on the L52ST series, so top or rear is the call. The unit is compatible with Montigo's full range of 5"/8" direct vent components, and Flexmaster flexible venting is approved for use. Any Montigo prepackaged vent kit will also work here, which simplifies sourcing considerably if you're working through an installer already familiar with the brand ecosystem.

At 295 lbs shipping weight, this is not a one-person delivery situation — plan accordingly and coordinate with your receiving crew before the freight truck arrives. The 63.5" shipping length reflects the substantial scale of what you're getting: a fireplace designed to anchor a room, not just warm it.

• See-through (two-sided) viewing with a 47" glass opening width
• 40,000 BTU/hr linear burner running on liquid propane
• SIT electronic ignition with Proflame 2 BASIC (IPI) control system
• Manual Hi-Lo flame control; note: no remote included with IPI Base Builders System
• Top or rear direct vent configuration via 5"/8" venting system (side vent not available)
• Compatible with all Montigo 5"/8" direct vent components and prepackaged vent kits
• Flexmaster flexible venting approved for this unit
• 6 bags of ice fireglass media included (IPI configuration)
• Framing dimensions: 59" W x 39" H x 23¾" D
• Minimum 17.5" clearance above shelf required for top vent installation
• Shipping weight: 295 lbs; shipping length: 63.5"